Summary
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1.
For the preparation of the dichloro dienic ketones RCOC(R′) = CH- CH= CC12, instead of 3,3-dichloroacrolein, a 3-alkoxy-l,l,3-trichloropropene or 3-alkoxy-1,1,1,3-tetrachloropropane can be used.
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2.
6-Substituted 2H-pyran-2-ones can be prepared from 3,3-dichloroacrolein or its “chloroacetals” in one stage without isolation of the corresponding dichlorodienic ketones.
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Literature cited
L. I. Zakharkin and L. P. Sorokina, Izv. AN SSSR. Otd. khim. n. 1958, 1445.
L. I. Zakharkin and L. P. Sorokina, Izv. AN SSSR. Otd. khim. n. 1962, 287.
L. I. Zakharkin and L. P. Sorokina, Izv. AN SSSR. Otd. khim. n. 1962, 2096.
A. N. Nesmeyanov, R. Kh. Freidlina, and L. I. Zakharkin, Dokl. AN SSSR97, 91 (1954).
M. Julia and J. Bullot, Bull. Soc. Chim. 1960, 28.
M. Julia, and J. Bullot, Bull. Soc. Chim. 1960, 23.
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This article is published in accordance with a resolution of the Conference of Chief Editors of Journals of the Academy of Sciences of the USSR, July 12, 1962, as a dissertation paper by L. P. Sorokina.
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Sorokina, L.P., Zakharkin, L.I. Preparation of 6-substituted 2H-pyran-2-ones via 3,3-dichloroacrolein and its chloroacetals. Russ Chem Bull 13, 62–65 (1964). https://doi.org/10.1007/BF01179568
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DOI: https://doi.org/10.1007/BF01179568